A true a substance that can be decomposed by bacterial
B because it’s talking about the tree itself. Saying that it’s plants would divert it to a different plant. The cells of the wood is what makes the tree and is relevant to the question
The cell is the smallest functional unit of life, which is why it is sometimes referred to as the building block of life.
I would say oxygen because respiration is breathing mechanically.
Trophic levels go by,
Producer (The nuts)
Primary Consumer (Squirrels)
Secondary Consumer (Raccoons)
Tertiary Consumer (Bear)
So squirrels would be at a lower trophic level.
Hope his help :)
